Structure For Preventing Derailment Of Railway Vehicle

ABSTRACT

A railway track and derailment prevention device has main bodies installed on left and right sides of a bogie main body of a vehicle, and thick plates are vertically slidable in wide grooves provided in the main bodies. During a right turn of the vehicle, a centrifugal force causes a left flange to ride on a left rail, the left main body moves obliquely upward toward the rail, a front surface of the thick plate collides with a side surface of a rail head, an L-shaped hook of the thick plate collides with an eave of the rail head, and the main body further floats, thereby cutting a positioning pin between the main body and the thick plate. The main body is guided by the thick plate, sprung up almost vertically, and then, dropped, and the wheel is returned onto the rail, and the derailment is prevented.

FIELD OF THE INVENTION

Technical field of preventing derailment of a railway vehicle on a curved railway track at high speed and derailment due to an earthquake.

BACKGROUND OF THE INVENTION

As a method for preventing derailment of the railway vehicle, special guard rails are currently used to prevent the railway vehicle from largely deviating from the rails after derailment. However, it seems that no method for preventing derailment of the vehicle itself has been developed.

SUMMARY OF THE INVENTION

A mechanism capable of preventing derailment is added to the structure of the vehicle to prevent derailment from a curved railway track and derailment due to an earthquake.

Escape prevention device main bodies 8 are each installed on left and right sides of a lower part of a bogie main body 5 of a vehicle, and in wide grooves 9 provided in the main bodies 8, escape preventing thick plates are housed so as to be vertically slidable. When the vehicle runs on a railway track curved to the right, a centrifugal force causes a flange part 7 of a left wheel to ride on a left rail 1, the left escape prevention device main body 8 moves obliquely upward toward the rail, a front surface 11 of the escape preventing thick plate 10 collides with a side surface 3 of a rail head 2, an L-shaped hook part 13 of the escape preventing thick plate 10 collides with a lower surface of an eave 4 of the rail head 2, and the escape prevention device main body further floats, thereby cutting a positioning pin 14 between the escape prevention device main body and the escape preventing thick plate. The escape prevention device main body is guided by the escape preventing thick plate, sprung up almost vertically by 10 cm or more, and then, dropped, and the wheel 6 is returned onto the rail, and the derailment is prevented.

When the bogie main body 5 jumps up due to an earthquake, the L-shaped hook parts 13 of the left and right escape preventing thick plates collide with the eaves 4 of the left and right rail heads 2, which cuts the left and right positioning pins 14. The left and right escape prevention device main bodies 8 are further guided by the escape preventing thick plates 10 fitted to the wide grooves 9 of the escape prevention device main bodies 8, sprung up almost vertically by 10 cm or more, and then, dropped to original positions, and the derailment is prevented.

Safety during traveling is maintained by adding the mechanism capable of preventing the derailment of the vehicle. Further, the cost due to railway track repair can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a longitudinal sectional view when escape prevention device main bodies are attached to a bogie main body of a vehicle, as an example of implementation of the present invention.

FIG. 2 is a sectional view taken along line A-A of FIG. 1 .

FIG. 3 is a longitudinal sectional view when a flange part of a wheel of the vehicle rides on a left rail and the escape prevention device main body floats, as an example of implementation of the present invention.

FIG. 4 is a sectional view taken along line B-B of FIG. 3 .

FIG. 5 is a longitudinal sectional view when the escape prevention device main body greatly springs up, as an example of implementation of the present invention.

FIG. 6 is a sectional view taken along line C-C of FIG. 5 .

DETAILED DESCRIPTION OF THE INVENTION

In a structure for preventing derailment of a railway vehicle, escape prevention device main bodies 8 are each installed on left and right sides of a lower part of a bogie main body 5 of the vehicle, and the escape prevention device main bodies have wide grooves 9 in which escape preventing thick plates 10 are housed so as to be vertically slidable, and when wheels 6 are on rails 1 in a normal state, front surfaces 11 of the escape preventing thick plates 10 and side surfaces 3 of rail heads 2 are spaced apart approximately 15 mm. The escape preventing thick plates have lower ends provided with L-shaped hook parts 13, and the hook parts have upper sides arranged under eaves 4 of the rail heads 2 with a distance of approximately 15 mm. At this time, positioning pins 14 are driven into the escape preventing thick plates 10 from the escape prevention device main bodies 8.

When the vehicle runs on a railway track curved to the right, a centrifugal force causes a flange part 7 of the left wheel to ride on the left rail 1, the left escape prevention device main body 8 moves obliquely upward toward the rail, the front surface 11 of the escape preventing thick plate 10 collides with the side surface 3 of the rail head 2, the L-shaped hook part 13 of the escape preventing thick plate 10 collides with a lower surface of the eave 4 of the rail head 2, and the escape prevention device main body further floats, thereby cutting the positioning pin 14 between the escape prevention device main body and the escape preventing thick plate. The escape prevention device main body is guided by the escape preventing thick plate, sprung up almost vertically by 10 cm or more, and then, dropped, and the wheel 6 is returned onto the rail, and the derailment is prevented.

Further, when the bogie main body 5 jumps up due to an earthquake, the L-shaped hook parts 13 of the left and right escape preventing thick plates collide with the eaves 4 of the left and right rail heads 2, which cuts the left and right positioning pins 14. The left and right escape prevention device main bodies 8 are further guided by the escape preventing thick plates 10 fitted to the wide grooves 9 of the escape prevention device main bodies 8, sprung up almost vertically by 10 cm or more, and then, dropped to original positions, and the derailment is prevented.

The structure for preventing derailment by the escape prevention device attached to the railway vehicle as described above. 

What is claimed is:
 1. A structure for preventing derailment of a railway vehicle from a railway track, comprising: left and right escape prevention device main bodies installed on left and right sides of a lower part of a bogie main body of the vehicle; the left escape prevention device main body having a left escape preventing thick plate, and the right escape prevention device main body having a right escape preventing thick plate; each escape prevention device main body having a wide groove in which the associated escape preventing thick plate is housed so as to be vertically slidable therein; when wheels of the vehicle are on rails of the railway track in a normal state, front surfaces of the escape preventing thick plates and side surfaces of rail heads of the rails being spaced apart approximately 15 mm; each escape preventing thick plate having a lower end provided with an L-shaped hook part with an upper side arranged under an eave of a rail head of an associated rail at a distance of approximately 15 mm, and having a positioning pin driven into the escape preventing thick plates from the associated escape prevention device main bodies; when the vehicle runs on the railway track with a curve to the right, a centrifugal force causing a flange part of a left wheel of the vehicle to ride on a left rail of the railway track, the left escape prevention device main body moves obliquely upward toward the left rail, the front surface of the left escape preventing thick plate collides with a side surface of the rail head of the left rail, the L-shaped hook part of the left escape preventing thick plate collides with a lower surface of the eave of the rail head, the left escape prevention device main body further floats, thereby cutting the positioning pin between left the escape prevention device main body and the left escape preventing thick plate, the left escape prevention device main body is guided by the left escape preventing thick plate, sprung up almost vertically by 10 cm or more, and then, dropped, the left wheel is returned onto the rail, and the derailment is prevented; and when the bogie main body jumps up from the railway track due to an earthquake, the L-shaped hook parts of the left and right escape preventing thick plates being operable to collide with the eaves of the left and right rail heads, which cuts the left and right positioning pins, the left and right escape prevention device main bodies are further guided by the escape preventing thick plates fitted to the wide grooves of the escape prevention device main bodies, sprung up almost vertically by 10 cm or more, and then, dropped to original positions, and the derailment is prevented. 